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inna [77]
3 years ago
13

Solve x2+4x+1=0. Please someone help me asap

Mathematics
2 answers:
Tanya [424]3 years ago
8 0
--Answer--


The answer is resolved in the photo.

Regards!

I hope it helps you :)

Soloha48 [4]3 years ago
5 0
The answer is C. x= 2+/- the square root of 3
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PLEASE EXPLAIN!!!
andrew11 [14]
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8 0
3 years ago
Complete the equation describing how x and y are related.
s344n2d4d5 [400]
-2x+1 hope this helps
3 0
3 years ago
The director of a state agency believes that the average starting salary for clerical employees in the state is less than ​$35 c
MrRissso [65]

Answer:

There is not enough evidence to conclude that  average starting salary for clerical employees in the state is less than ​$35,000 per year.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 35,000 dollars per year

Sample mean, \bar{x} = 34,700 dollars per year

Sample size, n = 100

Alpha, α = 0.10

Population standard deviation, σ = 3,500 dollars per year

First, we design the null and the alternate hypothesis

H_{0}: \mu = 35,000\text{ dollars per year}\\H_A: \mu < 35,000\text{ dollars per year}

We use one-tailed z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{34700 - 35000}{\frac{3500}{\sqrt{100}} } = -0.8571

Now, z_{critical} \text{ at 0.10 level of significance } = -1.28

Since,  

z_{stat} > z_{critical}

We fail to reject the null hypothesis and accept the null hypothesis.

Thus, there is not enough evidence to conclude that  average starting salary for clerical employees in the state is less than ​$35,000 per year.

3 0
3 years ago
Simplify the following expression by combining liker terms: 4x +9 -6x +6
Oxana [17]

Answer:

its very simple you just need to collect like terms...

which is 4x-6x+6+9 which is

-2x+15.

This is my answer I hope it helps you.

6 0
3 years ago
Read 2 more answers
The lines on the graph below represent the cost of apples at four different stores.
katen-ka-za [31]
At Store A is the cost of apples the least. This is because it always has the lowest price for each pound compared to the other lines. Hope this helps!
5 0
3 years ago
Read 2 more answers
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